Indeed it does. The problem though, is that the loonies who do the things you describe are not mainstream, they are a relatively small fringe. Remember, in those videos we only see the people the "reporter" wants us to see, not the much larger group of people who didn't say nutty things (since that wouldn't be "newsworthy"). The "Obama's gonna save us" video, on the other hand shows a level of religious worship that is far more dangerous in the long term, and my fear is that it is far more widespread than the loudmouths at the McCain rallies. Will these people start clamoring for the repeal of the 22nd amendment? I wouldn't put it past them.
I look at it this way. The nutcases have been around in every election, saying (and doing) stupid things. But when was the last time there was an organized children's choir singing praises to a political figure (not about ideas or principles, or even the nation, but directly to him) in this country? I've never seen anything like that before. At least, not here.